Roller ring



FIG. 1 is a perspective view of a roller ring showing my new design.

FIG. 2 is a top view thereof.

FIG. 3 is an edge view thereof.

FIG. 4 is a front view thereof.

FIG. 5 is a rear view thereof; and,

FIG. 6 is a bottom view thereof.

The undisclosed opposite edge view is a mirror image of the view shown in FIG. 3. 

The ornamental design of a roller ring, as shown and described. 